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2017 Microchip Technology Inc. DS20005758A-page 1
MIC841/2
Features
• 1.5V to 5.5V Operating Range
• 1.5 μA Typical Supply Current
• ±1.25% Voltage Threshold Accuracy
• 10 nA Maximum Input Leakage Current Over Temperature
• 10 μs Propagation Delay
• Externally Adjustable Hysteresis (MIC841)
• Internal 20 mV Hysteresis (MIC842)
• Output Options:
- Push-Pull, Active-High
- Push-Pull, Active-Low
- Open-Drain, Active-Low
• Open-Drain Output can be Pulled to 6V Regardless of VDD
• Immune to Brief Input Transients
• Teeny 5-Pin SC-70 Package
• 6-Pin 1.6 mm x 1.6 mm TDFN (MIC841)
• 4-Pin 1.2 mm x 1.6 mm TDFN (MIC842)
Applications• Smartphones
• PDAs
• Precision Battery Monitoring
• Battery Chargers
General Description
The MIC841 and MIC842 are micro-power,precision-voltage comparators with an on-chip voltagereference.
Both devices are intended for voltage monitoringapplications. External resistors are used to set thevoltage monitor threshold. When the threshold iscrossed, the outputs switch polarity.
The MIC842 incorporates a voltage reference andcomparator with fixed internal hysteresis; two externalresistors are used to set the switching thresholdvoltage. The MIC841 provides a similar function withuser adjustable hysteresis; this part requires threeexternal resistors to set the upper and lower thresholds(the difference between the threshold voltages beingthe hysteresis voltage).
Both the MIC841 and MIC842 are available withpush-pull or open-drain output stage. The push-pulloutput stage is configured either active-high oractive-low; the open-drain output stage is onlyconfigured active-low.
Supply current is extremely low (1.5 μA, typical),making it ideal for portable applications.
The MIC841/2 is supplied in the Teeny 5-pin SC-70,6-pin 1.6 mm × 1.6 mm Thin DFN (MIC841), and 4-pin1.2 mm × 1.6 mm Thin DFN (MIC842) packages.
Package TypesMIC841
SC-70-5 (C5)
LTH GND HTH
OUT VDD
Yxx
3 2 1
4 5
MIC8416-Pin TDFN (MT)
LTH
GND
HTH
OUT
NCVDD
1
2
3
6
5
4EP
MIC842SC-70-5 (C5)
NC GND INP
OUT VDD
Yxx
3 2 1
4 5
MIC8424-Pin TDFN (MT)
OUT
GND
VDD
INP
1
2 3
4
EP
Comparator with 1.25% Reference and Adjustable Hysteresis
MIC841/2
DS20005758A-page 2 2017 Microchip Technology Inc.
Typical Application CircuitsMIC841
Threshold Detection with Adjustable Hysteresis
HTH
OUTVDDLTH
GND
MIC841
VIN
R1
R2
R3
VOUT
VDD
VLTH > VHTHVREF = 1.24V
DD
MIC842Threshold Detection with Internal Fixed Hysteresis
INP
OUTVDD
GND
VIN
R1VOUT
VDD
VREF = 1.24V
DD
MIC842
R2
2017 Microchip Technology Inc. DS20005758A-page 3
MIC841/2
1.0 FUNCTIONAL BLOCK DIAGRAMS
Note: Block diagrams show SC-70 package pin numbers.
FIGURE 1-1: MIC841H Block Diagram
FIGURE 1-2: MIC841L Block Diagram
FIGURE 1-3: MIC841N Block Diagram
FIGURE 1-4: MIC842H Block Diagram
FIGURE 1-5: MIC842L Block Diagram
FIGURE 1-6: MIC842N Block Diagram
GND
VDD
OUT
1.24VBANDGAPREFERENCE
LOW-VOLTAGEDETECT
HIGH-VOLTAGEDETECT
R
S
Q
Q
LTH
HTH
VLTH
VHTH
MIC841H
VIN
3
1
2
4
5 VDD
GND
VDD
OUT
1.24VBANDGAPREFERENCE
LOW-VOLTAGEDETECT
HIGH-VOLTAGEDETECT
R
S
Q
Q
LTH
HTH
VLTH
VHTH
MIC841L
VDDVIN
3
1
2
4
5
GND
VDD
OUT
1.24VBANDGAPREFERENCE
LOW-VOLTAGEDETECT
HIGH-VOLTAGEDETECT
R
S
Q
Q
LTH
HTH
VLTH
VHTH
MIC841N
VIN
3
1
2
4
5 VDD
GND
VIN
1.24VBANDGAPREFERENCE
HIGH-VOLTAGEDETECTINP
VTH
MIC842H2
1
5
VDD
OUT4
VDD
GND
VIN
1.24VBANDGAPREFERENCE
HIGH-VOLTAGEDETECTINP
VTH
MIC842L2
1
5
VDD
OUT4
VDD
GND
VIN
OUT
1.24VBANDGAPREFERENCE
HIGH-VOLTAGEDETECTINP
VTH
MIC842N
4
2
1
5
VDD
VDD
MIC841/2
DS20005758A-page 4 2017 Microchip Technology Inc.
2.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (VDD) ................................................................................................................................... –0.3V to +7VInput Voltage (VINP, VLTH,VHTH) ..................................................................................................................................+7VOutput Current (IOUT) ............................................................................................................................................±20 mAESD Rating(1) .............................................................................................................................................................1 kV
Operating Ratings ‡
Supply Voltage (VDD) ................................................................................................................................ +1.5V to +5.5VInput Voltage (VINP, VLTH,VHTH) ........................................................................................................................ 0V to +6VVOUT (‘H’ and ‘L’ versions) ......................................................................................................................................... VDDVOUT (‘N’ version)........................................................................................................................................................+6V
† Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.This is a stress rating only and functional operation of the device at those or any other conditions above those indicatedin the operational sections of this specification is not intended. Exposure to maximum rating conditions for extendedperiods may affect device reliability.
‡ Notice: The device is not guaranteed to function outside its operating ratings.
Note 1: Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5 kΩ in serieswith 100 pF.
2017 Microchip Technology Inc. DS20005758A-page 5
MIC841/2
TABLE 2-1: ELECTRICAL CHARACTERISTICS
Electrical Characteristics: 1.5V ≤ VDD ≤ 5.5V; TA = 25°C. –40°C ≤ TA ≤ +85°C, unless noted. (Note 1).
Parameters Min. Typ. Max. Units Conditions
Supply Current (IDD) — 1.5 3 µA Output not asserted
Input Leakage Current (IINP) — 0.005 10 nA —
Reference Voltage (VREF) 1.225 1.240 1.256V
0°C ≤ TA ≤ 85°C
1.219 1.240 1.261 –40°C ≤ TA ≤ 85°C
Hysteresis Voltage (VHYST) (Note 2)
8 20 35 mV MIC842 only
Propagation Delay (tD) — 12 50µs
VINP = 1.352V to 1.128V
— 8 50 VINP = 1.143V to 1.367V
Output Voltage-Low (VOUT) (Note 3)
— 0.05 0.3
V
ISINK = 1.6 mA, VDD ≥ 1.6V
— 0.005 0.4 ISINK = 100 µA, VDD ≥ 1.2V
Output Voltage-High (VOUT) (Note 3)
— 0.99VDD — ISOURCE = 500 µA, VDD ≥ 1.6V
— 0.99VDD — ISOURCE = 50 µA, VDD ≥ 1.2V
Note 1: Specification for packaged product only.
2: VHTH = VREF + VHYST.
3: VDD operating range is 1.5V to 5.5V. Output is guaranteed to be de-asserted down to VDD = 1.2V.
MIC841/2
DS20005758A-page 6 2017 Microchip Technology Inc.
TEMPERATURE SPECIFICATIONS
Parameters Sym. Min. Typ. Max. Units Conditions
Temperature Ranges
Maximum Junction Temperature TJ — — +150 °C Note 1
Storage Temperature Range TS –65 — +150 °C —
Ambient Temperature Range TA –40 — +85 °C —
Lead Temperature — — — +260 °C Soldering, 10s
Package Thermal Resistances
SC-70-5 JA — 256.5 — °C/W —
6-Pin 1.6 mm x 1.6 mm TDFN JA — 92 — °C/W —
4-Pin 1.2 mm x 1.6 mm TDFN JA — 173 — °C/W —
Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained junction temperatures above +150°C can impact the device reliability.
2017 Microchip Technology Inc. DS20005758A-page 7
MIC841/2
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1 and Table 3-2.
TABLE 3-1: MIC841 PIN FUNCTION TABLE
Pin NumberSC-70
Pin NumberTDFN
Symbol Description
1 3 HTH High Threshold Input. HTH and LTH monitor external voltages.
2 2 GND Ground.
3 1 LTH Low Threshold Input. LTH and HTH monitor external voltages.
4 6
OUT (“H” Version) Active-Low Push-Pull Output. OUT asserts low when VLTH < VREF. OUT remains low until VHTH > VREF.
OUT (“L” Version) Active-High Push-Pull Output. OUT asserts high when VLTH < VREF. OUT remains high until VHTH > VREF.
OUT (“N” Version) Active-Low, Open-Drain Output. OUT asserts low when VLTH < VREF. OUT remains low until VHTH > VREF.
5 4 VDD Power Supply Input.
— 5 NC No Connect. Not internally connected.
— EP ePAD Heatsink Pad. Connect to GND for best thermal performance.
TABLE 3-2: MIC842 PIN FUNCTION TABLE
Pin NumberSC-70
Pin NumberTDFN
Symbol Description
1 3 INP Threshold Input. INP monitors an external voltage.
2 2 GND Ground.
3 — NC No Connect. Not internally connected.
4 1
OUT (“H” Version) Active-Low, Push-Pull Output. OUT asserts low when VINP < VREF. OUT remains low until VINP > (VREF + VHYST).
OUT (“L” Version) Active-High, Push-Pull Output. OUT asserts high when VINP < VREF. OUT remains high until VINP > (VREF + VHYST).
OUT (“N” Version) Active-Low, Open-Drain Output. OUT asserts low when VINP < VREF. OUT remains low until VINP > (VREF + VHYST).
5 4 VDD Power Supply Input.
— EP ePAD Heatsink Pad. Connect to GND for best thermal performance.
MIC841/2
DS20005758A-page 8 2017 Microchip Technology Inc.
4.0 APPLICATION INFORMATION
4.1 Output
The MIC841N and MIC842N outputs are an open-drainMOSFET, so most applications will require a pull-upresistor. The value of the resistor should not be toolarge or leakage effects may dominate. 470 kΩ is themaximum recommended value. Note that the output ofthe “N” version may be pulled up as high as 6Vregardless of the IC’s supply voltage. The “H” and “L”versions of the MIC841 and MIC842 have a push-pulloutput stage with a diode clamped to VDD. Thus, themaximum output voltage of the “H” and “L” versions isVDD (see Table 2-1).
When working with large resistors on the input to thedevices, a small amount of leakage current can causevoltage offsets that degrade system accuracy. Themaximum recommended total resistance from VIN toground is 3 MΩ. The accuracy of the resistors can bechosen based upon the accuracy required by thesystem. The inputs may be subjected to voltages ashigh as 6V steady-state without adverse effects of anykind regardless of the IC’s supply voltage. This applieseven if the supply voltage is zero. This permits thesituation in which the IC’s supply is turned off, butvoltage is still present on the inputs (see Table 2-1).
4.2 Programming the MIC841 Thresholds
The low-voltage threshold is calculated usingEquation 4-1.
EQUATION 4-1:
The high-voltage threshold is calculated usingEquation 4-2.
EQUATION 4-2:
In order to provide the additional criteria needed tosolve for the resistor values, the resistors can beselected such that they have a given total value, that is,R1 + R2 + R3 = RTOTAL. A value such as 1 MΩ forRTOTAL is a reasonable value because it drawsminimum current but has no significant effect onaccuracy.
FIGURE 4-1: MIC841 Example Circuit
Once the desired trip points are determined, set theVIN(HI) threshold first.
For example, use a total of 1 MΩ = R1 + R2 + R3. Fora typical single-cell lithium ion battery, 3.6V is a good“high threshold” because at 3.6V the battery ismoderately charged. Solving for R3:
EQUATION 4-3:
Once R3 is determined, the equation for VIN(LO) can beused to determine R2. A single lithium-ion cell, forexample, should not be discharged below 2.5V. Manyapplications limit the drain to 3.1V.
Using 3.1V for the VIN(LO) threshold allows thecalculation of the two remaining resistor values.
EQUATION 4-4:
The accuracy of the resistors can be chosen basedupon the accuracy required by the system.
VIN LO VREFR1 R2 R3+ +
R2 R3+--------------------------------- =
Where:
VREF 1.240V
VIN HI VREFR1 R2 R3+ +
R3--------------------------------- =
Where:
VREF 1.240V
VIN
R1604k 1%
R256k 1%
R3340k 1%
VDD
VDDLTHHTH
OUT
GND
470kVOUT
MIC841N
VIN HI 3.6V 1.24V1MR3
------------- = =
Solve:
R3 344 kΩ
VIN LO 3.1V 1.24V1M
R2 344k+------------------------------ = =
Solve:
R2 56 kΩ
R1 1 MΩ - R2 - R3
R1 600 kΩ
2017 Microchip Technology Inc. DS20005758A-page 9
MIC841/2
FIGURE 4-2: Output Response and Hysteresis
4.3 Programming the MIC842 Thresholds
The voltage threshold is calculated using Equation 4-5.
EQUATION 4-5:
FIGURE 4-3: MIC842 Example Circuit
In order to provide the additional criteria needed tosolve for the resistor values, the resistors can beselected such that they have a given total value, that is,R1 + R2 = RTOTAL. A value such as 1 MΩ for RTOTAL isa reasonable value because it draws minimum current,but has no significant effect on accuracy.
4.4 Input Transients
The MIC841/2 is inherently immune to very shortnegative-going “glitches.” Very brief transients mayexceed the VIN(LO) threshold without tripping theoutput.
As shown in Figure 4-4, the narrower the transient, thedeeper the threshold overdrive that will be ignored bythe MIC841/2. The graph represents the typicalallowable transient duration for a given amount ofthreshold overdrive that will not generate an output.
FIGURE 4-4: Input Transient Response
VIN LO VREFR1 R2+
R2-------------------- =
Where:
VREF 1.240V
MIC841/2
DS20005758A-page 10 2017 Microchip Technology Inc.
5.0 PACKAGING INFORMATION
5.1 Package Marking Information
5-Pin SC-70* Example
XXXNNN
4-Pin TDFN* Example
XX
B14408
6-Pin TDFN*
BL
Device MarkingMIC841H B13MIC841L B14MIC841N B15MIC842H B16MIC842L B17MIC842N B18
Device MarkingMIC841H BHMIC841L BLMIC841N BNMIC842H HBMIC842L HLMIC842N HN
Legend: XX...X Product code or customer-specific informationY Year code (last digit of calendar year)YY Year code (last 2 digits of calendar year)WW Week code (week of January 1 is week ‘01’)NNN Alphanumeric traceability code Pb-free JEDEC® designator for Matte Tin (Sn)* This package is Pb-free. The Pb-free JEDEC designator ( )
can be found on the outer packaging for this package.
, , Pin one index is identified by a dot, delta up, or delta down (trianglemark).
Note: In the event the full Microchip part number cannot be marked on one line, it willbe carried over to the next line, thus limiting the number of availablecharacters for customer-specific information. Package may or may not includethe corporate logo.
Underbar (_) and/or Overbar (⎯) symbol may not be to scale.
3e
3e
2017 Microchip Technology Inc. DS20005758A-page 11
MIC841/2
5 Lead SC70 Package Outline and Recommended Land Pattern
Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.
MIC841/2
DS20005758A-page 12 2017 Microchip Technology Inc.
6-Lead 1.6 mm x 1.6 mm Package Outline and Recommended Land Pattern
Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.
2017 Microchip Technology Inc. DS20005758A-page 13
MIC841/2
4-Lead 1.2 mm x 1.6 mm Package Outline and Recommended Land Pattern
Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.
MIC841/2
DS20005758A-page 14 2017 Microchip Technology Inc.
NOTES:
2017 Microchip Technology Inc. DS20005758A-page 15
MIC841/2
APPENDIX A: REVISION HISTORY
Revision A (April 2017)
• Converted Micrel data sheet MIC841/2 to Micro-chip data sheet DS20005758A.
• Minor grammatical corrections throughout.
MIC841/2
DS20005758A-page 16 2017 Microchip Technology Inc.
NOTES:
2017 Microchip Technology Inc. DS20005758A-page 17
MIC841/2
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office.
Examples:
a) MIC841HYC5-T5: Comparator with 1.25% Reference and Adjustable Hysteresis, Push-Pull, Active-Low, –40°C to +85°C Temperature Range, SC-70-5 Pack-age, 500/Reel
b) MIC841LYMT-TR: Comparator with 1.25% Reference and Adjustable Hysteresis, Push-Pull, Active-High, –40°C to +85°C Temperature Range, 1.6 mm x 1.6 mm TDFN Package, 5,000/Reel
c) MIC841NYC5-T5: Comparator with 1.25% Reference and Adjustable Hysteresis, Open-Drain, Active-Low, –40°C to +85°C Temperature Range, SC-70-5 Pack-age, 500/Reel
d) MIC842HYMT-T5: Comparator with 1.25% Reference and Internal Fixed Hysteresis, Push-Pull, Active-Low, –40°C to +85°C Temperature Range, 1.2 mm x 1.6 mm TDFN Package, 500/Reel
e) MIC842LYC5-TR: Comparator with 1.25% Reference and Internal Fixed Hysteresis, Push-Pull, Active-High, –40°C to +85°C Temperature Range, SC-70-5 Pack-age, 5,000/Reel
f) MIC842NYMT-TR: Comparator with 1.25% Reference and Internal Fixed Hysteresis, Open-Drain, Active-Low, –40°C to +85°C Temperature Range, 1.2 mm x 1.6 mm TDFN Package, 5,000/Reel
PART NO. XX
PackageDevice
Device: MIC841: Comparator with 1.25% Reference and Adjustable Hysteresis
MIC842: Comparator with 1.25% Reference and Internal Fixed Hysteresis
Output Stage: H = Push-Pull, Active-Low
L = Push-Pull, Active-High
N = Open-Drain, Active-Low
Temperature: Y = –40°C to +85°C
Package: C5 = SC-70-5
MT = 1.6 mm x 1.6 mm TDFN (MIC841 Only)
MT = 1.2 mm x 1.6 mm TDFN (MIC842 Only)
Media Type T5 = 500/ReelTR = 5,000/Reel
X
OutputStage
X
Temp.
-XX
MediaType
MIC841/2
DS20005758A-page 18 2017 Microchip Technology Inc.
NOTES:
2017 Microchip Technology Inc. DS20005758A-page 19
Information contained in this publication regarding deviceapplications and the like is provided only for your convenienceand may be superseded by updates. It is your responsibility toensure that your application meets with your specifications.MICROCHIP MAKES NO REPRESENTATIONS ORWARRANTIES OF ANY KIND WHETHER EXPRESS ORIMPLIED, WRITTEN OR ORAL, STATUTORY OROTHERWISE, RELATED TO THE INFORMATION,INCLUDING BUT NOT LIMITED TO ITS CONDITION,QUALITY, PERFORMANCE, MERCHANTABILITY ORFITNESS FOR PURPOSE. Microchip disclaims all liabilityarising from this information and its use. Use of Microchipdevices in life support and/or safety applications is entirely atthe buyer’s risk, and the buyer agrees to defend, indemnify andhold harmless Microchip from any and all damages, claims,suits, or expenses resulting from such use. No licenses areconveyed, implicitly or otherwise, under any Microchipintellectual property rights unless otherwise stated.
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The Microchip name and logo, the Microchip logo, AnyRate, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KeeLoq, KeeLoq logo, Kleer, LANCheck, LINK MD, MediaLB, MOST, MOST logo, MPLAB, OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC, SST, SST Logo, SuperFlash and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.
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Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, MiWi, motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PureSilicon, RightTouch logo, REAL ICE, Ripple Blocker, Serial Quad I/O, SQI, SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.
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All other trademarks mentioned herein are property of their respective companies.
© 2017, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
ISBN: 978-1-5224-1663-0
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Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of ourproducts. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such actsallow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
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DS20005758A-page 20 2017 Microchip Technology Inc.
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Taiwan - KaohsiungTel: 886-7-213-7830
Taiwan - TaipeiTel: 886-2-2508-8600 Fax: 886-2-2508-0102
Thailand - BangkokTel: 66-2-694-1351Fax: 66-2-694-1350
EUROPEAustria - WelsTel: 43-7242-2244-39Fax: 43-7242-2244-393
Denmark - CopenhagenTel: 45-4450-2828 Fax: 45-4485-2829
Finland - EspooTel: 358-9-4520-820
France - ParisTel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79
France - Saint CloudTel: 33-1-30-60-70-00
Germany - GarchingTel: 49-8931-9700Germany - HaanTel: 49-2129-3766400
Germany - HeilbronnTel: 49-7131-67-3636
Germany - KarlsruheTel: 49-721-625370
Germany - MunichTel: 49-89-627-144-0 Fax: 49-89-627-144-44
Germany - RosenheimTel: 49-8031-354-560
Israel - Ra’anana Tel: 972-9-744-7705
Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781
Italy - PadovaTel: 39-049-7625286
Netherlands - DrunenTel: 31-416-690399 Fax: 31-416-690340
Norway - TrondheimTel: 47-7289-7561
Poland - WarsawTel: 48-22-3325737
Romania - BucharestTel: 40-21-407-87-50
Spain - MadridTel: 34-91-708-08-90Fax: 34-91-708-08-91
Sweden - GothenbergTel: 46-31-704-60-40
Sweden - StockholmTel: 46-8-5090-4654
UK - WokinghamTel: 44-118-921-5800Fax: 44-118-921-5820
Worldwide Sales and Service
11/07/16